Simply put, it is a reproducible measure of how fast your machine can encode a short HD-quality video clip into a high quality x264 video file. It’s nice because everyone running it will use the same video clip and software. The video encoder (x264.exe) reports a fairly accurate internal benchmark (in frames per second) for each pass of the video encode and it also uses multi-core processors very efficiently. All these factors make this an ideal benchmark to compare different processors and systems to each other.
Benchmark Results: The x264 HD Video Encoding Benchmark uses two different passes. During the first pass of the x264 HD Video Benchmark the Intel Core I7 930 was able to outperform the first generation Phenom II X6 1055T. The AMD Phenom II X6 1075T, which has received a 7.14% speed increase over its predecessor was able to outperform the Intel System by nearly 3%. The second pass of the x264 HD Video Benchmark which is much more processor intensive, shows the AMD Phenom II X6 1075T with a 3.3% lead over the AMD Phenom II X6 1055T.